Researchers Have Developed a Battery-Free Cellphone

A simple cellphone developed by researchers at the University of Washington is the first workable model without a battery, said the recently published paper in Proceedings of the Association for Computing Machinery of Interactive, Mobile, Wearable and Ubiquitous Technologies.

The tiny vibrations generated through the phone’s microphone and speaker when a person speaks are translated into motion with the help of an antenna. The antenna then converts them to analog radio signals recognizable to the base station. Hence, this process of radio signals does not require power to charge any component.